Roller



June l?, 1924. 1,498,180

O. LINDE'R ROLLER Filed July 9. 1921 Inl/e2? for Patented .lune il?,i924..

'unirse saires earner cerise..

@SCAR LINDER, 0F CHICAGO, ILLINOIS, ASSIGNOR T0 IDEAL ROLLER @L MFG.C0., 0F CHICAGO, ILLINOIS, A CGRPOB/ATION OF ILLINOIS.

netten.

application med July a,

To all whom z't may concern.'

Be it known that I, OSCAR LINDER, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful lmprovements in Rollers, of which the followling is a full, clear, concise, and exact description, reference beinghad to the accompanying drawing, forming a part of this speciication.

`This invention relates to an improved roller, and more particularly aprinters roller or lithographers roller. The invention comprises animproved combination roller and washer, the washer being applicable,however, to any kind of roller or cylinder which consists of a rigidcore that is ccvlered with an elastic and resilient materia One of theobjections to rollers of the type having a rigid core covered with anelastic y and resilient material is the ease with which the elasticcomposition can be damaged accidentally at the ends of the roller. Afurther objection is the tendency of the elastic composition to workloose from the rigid core at and near the ends of the roller upon slightaccidental damage to the roller material at said ends. It is one of theobjects of this invention to construct a roller which is provided withmeans whereby these and 'other objections readily apparent from thefollowing description are substantially eliminated.

In the preferred construction of a roller,

,according to the teachings of this invention,

a rio'id washer preferably constructed of meta such as steel, brass,fibre, hard rubber or any other suitable substance is attached to theend of the roller. The washer is preferably, but not necessarilyfastened to the rigid core or stock of the roller by means of suitablescrews, such as hereinafter described and illustrated in theaccompanying drawings. This washer serves to protect the ends of theresilient rolle-1' material from accidental injury. The washers arepreferably so secured to the roller that they .form

practically an integral part thereof, and whereby they will not bereadily loosened or detached. However, they are so secured that ifdesired they can-be removed, if it becomes necessary to recast theroller. The washers are preferably made of such a diameter that theOutside periphery thereof does 1921. Serial No. 483,409.

not extend to the outer periphery of the resilient roller material.

rllhe invention is illustrated in the accompanying drawings, in which-Figure l shows the general construction of a typical roller .partly insection with washer attached;

Fig. 2 is an end elevation of the roller shown in Fig. 1; y

Fig. 3 is a view in elevation partly in section of a roller fitted witha split or slit washer;

Fig. 4 isan end view ofthe roller shown in Fig. 3;

Fig. 5 is an illustration insectional elevation of a roller in which thewasher is both screwed and cemented to the roller core and the rollermaterial;

Fig. 6 is an end elevation of the roller illustrated in Fig. 5;

Fig. 7 illustrates another form of split washer;

Figs. 8 and 9 are views in sectional elevation of rollers which haverounded shoul- Aders and illustrates the method of fastening the washersto this character of roller;

Fig. l() illustrates a roller in sectional elevation having a plain corewithout shoul-y ders; and, f Fig. 1l is an illustration in sectionalelevation illustrating the use of the washer on a dampening or waterroller used in lithography.

As illustrated in all of the drawings the washers are constructed sothat their outer diameter is slightly less than the outer diameter ofthe resilient roller material. In the preferred form of roller theoutside dialeter of the washer is made from to .1, smaller than theoutside diameter of the resilient roller material. When a roller isfitted with a washer, as illustrated in the drawings, the elasticmaterial of the roller may be made of either glue composition,vulcanized oil, rubber, fabric, leather, or any of the other materialsfrequently used, and this material may be compressed, as frequentlyhappens in the commercial use of the roller, without any danger ofhaving the washer bear on the surface or on the type which is beinginked 'or moistened. Obviously, it vwould be undesirable and detrimentalto make the washer so large so that in a practical operation of theroller there to be touched'only by the resilient roller material.

As illustrated in the drawings, the rigid roller core consists usuallyof a central body 16 and of spindles 17. The central body 16 isordinarily of larger diameter than the spindles 17, as illustrated forexample in Figs. 1 and 8, thus forming a shoulder 18, which may beeither square, as illustrated in Fig. 1, or round, as illustrated inFig. 8. The washer 19 may be either fastened to the rigid core by meansof screws such as 20, or by any other suitable 'means The washer, insome casesfmay be fastened to .the rigid core and the resilient materialby means of a cement made from the same material from which therolleritself is made. Both means may be used to fasten the washer to theroller, if desired. Thus for example, in a roller made of vulcanizedoil, the washer may be cemented to the roller and to the rigid core bymeansof an elastic cement 21 of vulcanized oil, as clearly illustratedin Fig. 5. This cement consists preferably, but not necessarily, of thesame material, consistency and resiliency as the roller material. Thethickness of this layer of cement is preferably made from i to Thecentral core 16 may be of any desired material such as metal, wood,etc., and may be either solid, as` illustrated in Fig. 1, or hollow, asillustrated in Fig. 8.

The resilient material 22 with which the roller is covered may be anyone of the compositions or materials well known for-this purpose in theart, as for example, vulcanzld oil, rubber, glue composition and the Thewasher 19 is preferably made of brass, but may be made of any othermatethe rollers are to be rial, as for example, wood, fibre, or anymaterial having the required'rigidity. The washer should be made of athickness which will conform to the requirements of the dif-- ferentkinds of rollers andthe use to which put. For example, in a roller suchas illustrated in Fig. 1, in which there is a shoulder which supportsthe washer, a washer of about thickness is preferably used; whereas, ina roller such as illustrated in Figs. 8, 9 and 10, a washer of from i tothickness is preferably used.

If the washer 19 is secured to the roller `entirely by cement, a plainwasher, similar to the. one shown in Fig. 6, is used without theperforations shown in this' washer. However, the washer, which issecured to the roller core 16, is preferably provided with perforationswhich are countersunk to receive the flat-headed screws as illustratedin the drawings. The screws such as 2O are utilized to 'fasten thewasher rigidly to the roller core 16,- these screws being machinescrews, when the core is constructed of metal, the'core being drilledand tapped to receive these screws. When the core is made of,a softermaterial, such as wood, obviously wood screws are used. Ordinarily it isadvisable, in order that the washers 19 may be securely held to the core16, to cement said washers'to the core 16 and to the resilient material22, as hereinbefore described, and to use in addition the screws l ltion25, and when thus litted on the spindle 17, past the enlarged portion25, the split ends of the washer can'be forced together again and thesplitwasher can then be secured to the core in any of the mannersillustrated in the drawings and hereinbefore described.A Instead ofusing a split washer, as illustrated in Fig, 4, a two-piece washer, asillustrated in Fig. 7, may be utilized, this washer being fitted'on thespindle 17 by assembling and fastening the twov halves 26 and 27 lof thewasher over ,the spindle. When the washer is assembled on the spinld'le,as illustrated in Fig. 7, it'can be secured to the core 16 in any one ofthe methods hereinbefore described.

In order to give the extreme end of the roller material the sameresilience as that of the rest ofthe roller, it is preferred to bevelthe roller material as shown at 28 in Figs. 1, 3 and 8. This beveling ofthe extreme end of the roller veliminates the restraining influence ofthe washer which would occur in case this bevel was not utilized.

In the 'construction' of the washers, as used in these rollers, the sizeof the center hole ofv the washer which fits over the spindle isimmaterial. so that the washer will t snugly on the spindle 17, or thecenter hole may be made considerably larger. the washer is the importantconsideration. This outer diameter of said washer must be made slightlysmaller than the outer diameter of the outer resilient elastic material,

all`da-mpening rollers, lithograph and off? set work. It is customary tocover such dampening rollers with one or more vlayers of water absorbingfabric such as wood, flannel, molleton, moleskin and theflike, as

This hole may be made.

The outer diameter of illustrated in F ig. 11. When the rollers are thuscovered with this material, it'is necessary to stretch the fabric verytightly over the roller. `ln the past rollers of this kind have beenmade by stretching this material directly over the roller metal stock,but in recent commercial practice the core is first covered with a-layerof some resilient elastic material such as vulcanized oil or rubberbefore the Water absorbing "fabric is stretched over the roller. Theobject lof this elastic material is to provide an elastic base under thefabric which gives more life to the roller. The main objections to using.such a resilient material under the water absorbing fabric resides inthe ease with which said resilient material is damaged at` and near theends owing to the stretching of the fabric over said material. Mostmaterials of high resiliency and elasticity are mechanically weak andare consequently readily damaged when subjected to -rough treatment.These resilient materials are very readily damaged when the fabric'is istretched over the roller, particularly since the fabric used for suchdampening rollers must be stretched and sewed very tightly ovr theroller and tied tightly over the en s.

In the roller, as illustrated in Fig. 11, the washer 19 prevents injuryto the end of the resilient elastic material because' of the stretchingof the water absorbing fabric such as 30 over said resilient material.It will be apparent from the drawings that the strains at the ends ofthe roller exerted by v the Water absorbing material 31 aretaken andparticularly printers and lithographers rollers.

Obviously, the invention is not limited to any particular form oranypparticular use, but the spirit ofthe invention` is capable of manyapplications and many' forms as set out in the appended claims.

Having thus described my invention,

what I/claim as new a-nd desire to secure by.

Letters Patent of the United States is:

1.1ln combination, a rigid roller core, a resilient roller material,rigid washers secured to the roller core and cemented to said rollermaterial for protecting the endsxo'f said material.

2. In combination, a rigid roller core, a resilient roller material,rigid washers secured to the roller core for the protectionof theresilient material, and a substantial layer of elastic cement interposedbetween the washers and the resilient material and 'adapted to'securethe washers ient material.

ln combination, a rigid roller core, re-

silient roller material superposed upon said roller core; rigid Washerssecured to the roller core for' the protection of said resilientmaterial, and a substantial layer of resilient material similar to thematerial of which the resilient roller material is made vadapted tosecure the washers to each end of said resilient vroller material.

4.v In combination, a roller core and a resilient roller materialsuperposed upon said core, rigid washers secured to the end of saidroller core Ato protect said resiilent material, anda substantial layerof elastic cement interposed between the washers and the roller andadapted tosecure the Washers to the roller and the said resilientmaterial,

said washers having a diameter smaller than the diameter of theresilient roller material.

In witness whereof, I have hereunto subscribed my name.

OSCAR LINDER.

to said resilj

